On the Relationship between Magnetic Viscosity and Coercivity of Perpendicular Media

J.G.Th. te Lintelo; J.C. Lodder

doi:10.1063/1.357689

On the Relationship between Magnetic Viscosity and Coercivity of Perpendicular Media

J.G.Th. te Lintelo, J.C. Lodder

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Abstract

The dependent and dc-demagnetization measurements were performed on two types of perpendicular thin film media, Co-Cr and Fe-alumite. From these the parameters for magnetic viscosity and irreversible susceptibility were derived. Their ratio, resulting in the fluctuation field, is shown to relate logarithmically to the coereivity. This so-called “Barbier plot for perpendicular media” is found to exhibit a slope of approximately one and a half instead of one, as is found for in-plane media. The activation volumes were also derived and related logarithmically to the coercivity. Here a slope of approximately minus one and a half was found, instead of minus 0.73 as is found for in-plane media.

Original language	English
Pages (from-to)	1741-1744
Number of pages	4
Journal	Journal of Applied Physics
Volume	76
Issue number	3
DOIs	https://doi.org/10.1063/1.357689
Publication status	Published - 1994

Keywords

SMI-EXP: EXPERIMENTAL TECHNIQUES
SMI-TST: From 2006 in EWI-TST

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title = "On the Relationship between Magnetic Viscosity and Coercivity of Perpendicular Media",

abstract = "The dependent and dc-demagnetization measurements were performed on two types of perpendicular thin film media, Co-Cr and Fe-alumite. From these the parameters for magnetic viscosity and irreversible susceptibility were derived. Their ratio, resulting in the fluctuation field, is shown to relate logarithmically to the coereivity. This so-called “Barbier plot for perpendicular media” is found to exhibit a slope of approximately one and a half instead of one, as is found for in-plane media. The activation volumes were also derived and related logarithmically to the coercivity. Here a slope of approximately minus one and a half was found, instead of minus 0.73 as is found for in-plane media.",

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AU - te Lintelo, J.G.Th.

AU - Lodder, J.C.

PY - 1994

Y1 - 1994

N2 - The dependent and dc-demagnetization measurements were performed on two types of perpendicular thin film media, Co-Cr and Fe-alumite. From these the parameters for magnetic viscosity and irreversible susceptibility were derived. Their ratio, resulting in the fluctuation field, is shown to relate logarithmically to the coereivity. This so-called “Barbier plot for perpendicular media” is found to exhibit a slope of approximately one and a half instead of one, as is found for in-plane media. The activation volumes were also derived and related logarithmically to the coercivity. Here a slope of approximately minus one and a half was found, instead of minus 0.73 as is found for in-plane media.

AB - The dependent and dc-demagnetization measurements were performed on two types of perpendicular thin film media, Co-Cr and Fe-alumite. From these the parameters for magnetic viscosity and irreversible susceptibility were derived. Their ratio, resulting in the fluctuation field, is shown to relate logarithmically to the coereivity. This so-called “Barbier plot for perpendicular media” is found to exhibit a slope of approximately one and a half instead of one, as is found for in-plane media. The activation volumes were also derived and related logarithmically to the coercivity. Here a slope of approximately minus one and a half was found, instead of minus 0.73 as is found for in-plane media.

KW - SMI-EXP: EXPERIMENTAL TECHNIQUES

KW - SMI-TST: From 2006 in EWI-TST

U2 - 10.1063/1.357689

DO - 10.1063/1.357689

M3 - Article

SN - 0021-8979

VL - 76

SP - 1741

EP - 1744

JO - Journal of Applied Physics

JF - Journal of Applied Physics

IS - 3

ER -

On the Relationship between Magnetic Viscosity and Coercivity of Perpendicular Media

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Keywords

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